Stefán Karl Stefánsson, Icelandic actor
Stefán Karl Stefánsson (; Icelandic: [ˈstɛːfaun ˈkʰartl̥ ˈstɛːfaunsɔn]; 10 July 1975 – 21 August 2018) was an Icelandic actor and singer. He is best known for portraying Robbie Rotten, the antagonist of the children's television series LazyTown.